UnivMinimSourceUnordered pairs of universe levels (ie (u,v) = (v,u))
Simplification and pruning of constraints: normalize_context_set ctx us
us with their most precise universe levels respecting the constraints.ctx w.r.t. equality constraints, choosing a canonical universe in each equivalence class (a global one if there is one) and transitively saturate the constraints w.r.t to the equalities.val normalize_context_set :
lbound:UGraph.Bound.t ->
UGraph.t ->
Univ.ContextSet.t ->
UnivSubst.universe_opt_subst ->
Univ.LSet.t ->
UPairSet.t ->
(UnivSubst.universe_opt_subst * Univ.LSet.t) Univ.in_universe_context_set